Yan Hui-Juan, Ren Ling-Ling, Fan Xiao-Lin, Liang Han-Pu, Hu Jin-Song, Wan Li-Jun, Wang Chen, Bai Chun-Li
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
J Nanosci Nanotechnol. 2004 Nov;4(8):1081-4. doi: 10.1166/jnn.2004.143.
The electrical property of a self-assembled monolayer (SAM) of mercaptohexadecanoic acid (HS-C15H30-COOH) has been investigated with a tunneling junction confined in a capillary. This capillary method can shun the interference of vacuum gap. The contact area can be determined according to the diameter of capillary. The nonlinear current-voltage curve and dl/dV curve are measured in the potential range of +/-0.8 V. The slight asymmetry of I-V curve and dl/dV curve is attributed to the different coupling between the metal and the end-groups of molecule. This method will supply a simple way to measure the property of single molecules and monolayers.
利用限制在毛细管中的隧道结研究了巯基十六烷酸（HS-C15H30-COOH）自组装单分子层（SAM）的电学性质。这种毛细管方法可以避免真空间隙的干扰。接触面积可根据毛细管直径确定。在±0.8 V的电位范围内测量了非线性电流-电压曲线和dl/dV曲线。I-V曲线和dl/dV曲线的轻微不对称归因于金属与分子端基之间不同的耦合。该方法将为测量单分子和单分子层的性质提供一种简单的方法。
